Reconstructing the evolution of dark energy with variations of fundamental parameters

Details Reconstructing the evolution of dark energy with variations of fundamental parameters Reconstructing the evolution of dark energy with variations of fundamental parameters

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hia....15..303n&link_type=abstract

Highlights of Astronomy, Volume 15, p. 303-303

Astronomy and Astrophysics

Astronomy

Scientific paper

A popular candidate of dark energy, currently driving an accelerated expansion of the universe, is a slowly rolling scalar field or quintessence. A scalar field, however, must couple with other sources of matter. Consequently, its dynamical evolution can result in extra interactions between standard particles, which are mediated by the field, and to a variation in the fundamental parameters. Curiously, it has been reported that observations of a number of quasar absorption lines suggest that the fine structure constant was smaller in the past, at redshifts in the range z=1-3 (Murphy et al. (2003), Murphy et al. (2004), but see also Srianand et al. (2007)). Could this indeed be the signature of a slowly evolving scalar field?

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